Gasoline Additives

Justin I've never used MMO in a crankcase but have had zero issues with it in the fuel system. I can't tell you when the last time was that I had carburetor issues on a small engine. It does have a high percentage of solvent content and therefore should be a good varnish remover in the crankcase as well.

I'm. Ok with every thing but the fuel injection cleaner. Not a fan of it at all. To me its just alcohol. All the others are ok in my book. I also use marine stable.